/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.netbeans.lib.profiler.heap;

import java.util.AbstractList;


/**
 *
 * @author Tomas Hurka
 */
class ObjectArrayLazyList extends AbstractList {
    //~ Instance fields ----------------------------------------------------------------------------------------------------------

    private final HprofByteBuffer dumpBuffer;
    private final HprofHeap heap;
    private final int idSize;
    private final int length;
    private final long offset;

    //~ Constructors -------------------------------------------------------------------------------------------------------------

    ObjectArrayLazyList(HprofHeap h, HprofByteBuffer buf, int len, long off) {
        heap = h;
        dumpBuffer = buf;
        length = len;
        offset = off;
        idSize = dumpBuffer.getIDSize();
    }

    //~ Methods ------------------------------------------------------------------------------------------------------------------

    public Object get(int index) {
        return heap.getInstanceByID(dumpBuffer.getID(offset + ((long)index * (long)idSize)));
    }

    public int size() {
        return length;
    }
}
